Characterization of gas turbine ingested sand particles based on electrostatic signal

Abstract

Particle ingestion into a gas turbine can have serious effects on both performance and engine in-service reliability. Thus there exists a need for in situ monitoring and characterizing particulate matter entering an aircraft engine inlet for the purposes of engine damages estimation and prognosis. This paper presents the initial development of Ingested Debris Monitoring System (IDMS) signal processing method of characterizing the ingested particles. A theoretical analysis and simulation study were carried out to study the relationships between the characteristics of the ingested sand particles and the features of the IDMS signal both in frequency- and time-domain. A Finite-Element Modeling (FEM) for the IDMS Sensor was developed, then the validated FEM modeling was used for simulation experiments of particles ingestion under various conditions of different particle moving speeds, concentrations and charge-to-mass ratios. Results of the theoretical analysis and simulation study demonstrates the feasibility and effectiveness of the proposed method to provide real time information characterizing the size and concentration of ingested sand particles, and will serve as an impetus to carry out further research.

The Electrostatic Induction Characteristics of SiC/SiC Particles in Aero-Engine Exhaust Gases: A Simulated Experiment and Analysis

“…In previous studies, researchers have classified the factors affecting the charge characteristics of exhaust particulate matter into exhaust gas material properties [31][32][33]43], temperature [33], particle mass concentration [43][44][45][46], particle size [33,[43][44][45][46], and aeroengine exhaust gas velocity [43][44][45][46] according to the operating environment of the engine. This paper also uses the above factors to facilitate the comparison and analysis.…”

“…Due to the high-temperature, high-speed, and harsh working environment of aero-engine exhaust, the current aero-engine electrostatic monitoring test rigs are unable to accurately measure the concentration of injected fault particles. In the field of aero-engine electrostatic monitoring, except for some studies using ANSYS (version 2019 R1) simulation software to provide specific mass concentrations in simulated experiments [44][45][46], other experiments have been unable to provide accurate particle concentrations. In real aero-engine electrostatic monitoring tests, the common approach is to specify the mass of the injected particles [31][32][33][34]43], as ensuring the same particle mass in comparative tests can approximately guarantee the same mass concentration.…”